finally found a physio - jenny johnston and assistant.
they found the problem so its a case of special exercises and massage for a fair few weeks. will keep u posted.
he trots up sound but has injured his rump muscles (the silly bugger got his hips trapped between 2 strainers that were 12 inches apart, after he jumped out of his field in may, and had to be cut free, but had obviously struggled and hurt himself)
his rump is now unlevel but hopefully by spring he should be ok to carry on his work again.
thanx